Depends....
(Edit). Sorry, shouldn't have left that hanging. If you believe that you can improve, and have the desire to improve, then you will most likely improve if you learn standard archery form.
So what it "depends" on is if you're willing to spend the time learning something different with no guarantee that you will be able to shoot better than you already are able to. Probably what will happen is that you may initially shoot worse for a while as you are learning to do things differently, but after you master the new skills you will end up shooting better. But that's not the case with everyone, and I'm aware of people who have decided that it's better to go back to the way they were shooting before.